My sister has POA of my dad. She lives 5 mins from him while i live out of state so she took care of him before she put him in assist living. Well me and her had a falling out and she blocked my dad from me. What can be done? I don't know where to begin or if anything can be done. He has no phone in his room so I can't talk to him. If you call they say call POA. My father wouldn't want to be blocked from his children. This is wrong there in new Jersey I'm in Pennsylvania.
Since this kind of thing seems to happen all the time, I think it should be written in the POA. "No child will be kept from seeing me unless its found their presence in some way causes me stress. And this needs to be confirmed by a qualified staff member or my PCP" or something along those lines.
Your only other legal recourse is to go to court for guardianship of your father. You must prove that he is incapacitated and that your sister is somehow abusing her duties as PoA. You must have the time and money to do this, and a strong case. FYI if a judge believes the family fighting from both parties is detrimental to your father, the court may decide that the county would be the best actor for your father's best interests and will assign guardianship to the county -- and then neither of you will be PoA or guardian.
You may want to strike a deal with your sister: she can be with you on a visit. This will get you in to see him and she will know what transpires during the visit. A sort of win-win. You may want to ask her in writing (like text or email) so you have proof you asked and proof of her answer. But right now, no one is being let in to see their LOs in NHs because of the very real danger of the Covid-19 virus. They may be in quarantine for many months to come.
I'm sorry but there really aren't any other legal pathways you can take. I wish you peace in your heart as you decide what to do.